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The improbable chain of events that leads Alexander Fleming 1. ______
The improbable chain of events that leads Alexander Fleming 1. ______
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2025-05-04
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问题
The improbable chain of events that leads Alexander Fleming 1. ______
to discover penicillin in 1928 is the stuff which scientific myths 2. ______
are made. It was a discovery that would change the course of the history. The active ingredient in that mold, which Fleming
named penicillin, turned to be an infection-fighting agent of 3. ______
enormous potency. When it was finally recognized as what it
was--the efficacious life-saving drug in the world--penicillin 4. ______
would alter forever the treatment of bacterial infections. By the
middle of the century, Fleming’s discovery spawned a huge phar- 5. ______
maceutical industry, churning out synthetic penicillin that would
conquer some of man-kind’s most ancient scourges, including
syphilis, gangrene, and tuberculosis.
When he died a heart attack in 1955, he was mourned by 6. ______
the world and buried as a national hero in the crypt of St. Paul’s
Cathedral in London. Although Fleming’s scientific work in and
of itself may not have reached great, his singular contribution 7. ______
changed the practice of medicine. He deserves our utmost recog-
nition. At the same time, we must bear on mind that the 8. ______
"Fleming Myth", as he called it, embodies the accomplishments
of many giants of anti-biotic development. Fleming is but a cho-
sen representative for the likes of Florey, Chain, Domagk, and
Waksman, many of who remain, sadly, virtual unknowns. 9. ______
Their achievements have made the world a better, healthier
place. In commemorating Fleming, and we commemorate them 10. ______
all.
How does it happen that children learn their mother tongue
so well? When we compare with adults learning a foreign 11. ______
language, we often find this interesting fact. A little child
without knowledge or experience often succeeds to a complete 12. ______
master of the language. A grown-up person with fully developed 13. ______
mental powers, in most cases, may end up in a faulty and inex- 14. ______
act command. What accounts of this difference? 15. ______
Despite other explanations, the real answer in my opinion
lies partly with the child himself, partly in the behavior of the 16. ______
people surround him. In the first place, the time of learning the 17. ______
mother tongue is the most favorably of all, namely, the first 18. ______
years of life. A child hears it speak from morning till night and, 19. ______
what is more important, always in its genuine form, with the
right pronunciation, right intonation, right use of words and right
structure. He drinks all the words and expressions which come to 20. ______
him in a fresh,ever-bubbling spring.There is no resistance:
there is perfect assimilation. [br]
选项
答案
turned∧改错out。
解析
turn out to be是固定用法,意为“结果却是”。
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